WO2022054125A1 - Dispositif d'affichage vidéo et système à affichage multiple - Google Patents

Dispositif d'affichage vidéo et système à affichage multiple Download PDF

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Publication number
WO2022054125A1
WO2022054125A1 PCT/JP2020/033923 JP2020033923W WO2022054125A1 WO 2022054125 A1 WO2022054125 A1 WO 2022054125A1 JP 2020033923 W JP2020033923 W JP 2020033923W WO 2022054125 A1 WO2022054125 A1 WO 2022054125A1
Authority
WO
WIPO (PCT)
Prior art keywords
video display
image display
housing frame
display device
led
Prior art date
Application number
PCT/JP2020/033923
Other languages
English (en)
Japanese (ja)
Inventor
常男 藤沼
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2020/033923 priority Critical patent/WO2022054125A1/fr
Publication of WO2022054125A1 publication Critical patent/WO2022054125A1/fr

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/40—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character is selected from a number of characters arranged one beside the other, e.g. on a common carrier plate

Definitions

  • the present disclosure relates to a multi-display system in which a plurality of video display devices and video display devices are combined.
  • Multi-display systems which consist of a large screen with a video display device in which multiple display elements such as LEDs are arranged, are often used for outdoor and indoor advertisement display, etc., thanks to the technological development and cost reduction of display elements.
  • multi-display systems equipped with this video display device have been mainly used for displaying moving images of natural images and animations.
  • a multi-display system equipped with a video display device displays images of a personal computer such as a conference room or a monitoring application. It is also used for. In particular, in surveillance applications, personal computer images close to still images are often displayed.
  • an LED display element is mounted inside a cavity molded of ceramic or resin, and a small LED display panel formed by solidifying the LED display element with a sealing resin is used as a substrate. It is the mainstream to use a mounted SMD (Surface Mount Device) type video display device.
  • SMD Surface Mount Device
  • the SMD type video display device so far has been used for large multi-display systems with a pixel pitch of 3 mm or more.
  • video display devices in which LED display elements composed of high-density mounting products having a pixel pitch of 1 mm or more and 2 mm or less are arranged are tile-shaped.
  • Large-scale multi-display systems that are configured side by side have been introduced to the market.
  • Patent Document 1 discloses a component of a video display device and a method for holding the same.
  • the purpose of this disclosure is to provide a technique capable of improving the quality of video display.
  • the video display device includes a video display panel on which a display element is arranged, a housing frame to which the video display panel is to be fixed, and a first positioning pin or a first positioning pin provided on the housing frame.
  • the image display panel for the housing frame includes a positioning hole and a second positioning hole provided in the image display panel and inserted into the first positioning pin or a second positioning pin inserted into the first positioning hole.
  • the housing frame is provided with a positioning portion for determining a fixing position of the image display panel and a fixing portion for fixing the image display panel to the housing frame.
  • a groove having an opening angle selected from 98 ° or more and 100 ° or less, 103 ° or more and 105 ° or less, and 110 ° or more and 113 ° or less is formed in the contact portion.
  • the reflected light emitted from the groove can be attenuated. This makes it possible to improve the quality of the video display.
  • FIG. 1 is a perspective view showing a schematic configuration of a multi-display system 200 according to an embodiment.
  • the multi-display system 200 includes a plurality (six) video display devices 101 to 106 for displaying images arranged in a matrix.
  • the video display devices 101 to 106 are not distinguished, they are referred to as the video display device 100.
  • the multi-display system 200 is configured by combining a plurality of video display devices 100 fixed by fixed parts (not shown), and can display an image on a large screen in which the display screens of the plurality of video display devices 100 are combined. It has become.
  • FIG. 2 is a perspective view showing a schematic configuration of the image display device 100.
  • the image display device 100 includes a plurality of LED panels 1001 to 1008 and a housing frame 10.
  • the LED panel 1000 is described.
  • the LED panel 1000 corresponds to a video display panel.
  • the LED panel 1000 is provided with a plurality of display elements such as an LED chip 6 (see FIG. 6).
  • the housing frame 10 is a frame made of a conductive metal material for fixing a plurality of LED panels 1001 to 1008. Further, the metal material constituting the housing frame 10 is a non-magnetic material.
  • FIG. 3 is a rear perspective view showing the configuration of the LED panel 1000.
  • the LED panel 1000 includes an LED substrate 1 in which a plurality of LED chips 6 (see FIG. 6) are arranged, a connector 2, and an LED substrate accessory member 3 made of a conductive metal material. , A plurality of (8) magnet attractors 4 are provided.
  • the LED board accessory member 3 is formed in a rectangular shape when viewed from the rear, and is formed in a shape in which the central portion protrudes rearward with respect to the upper portion and the lower portion.
  • Four screw bosses 1a extending in the front-rear direction are formed in the central portion on the back surface of the LED substrate 1, and the four screw bosses 1a are formed at positions corresponding to the four corner portions of the LED substrate accessory member 3. With the holes formed in the four corners of the LED board accessory 3 aligned with the screw holes of the four screw bosses 1a, the four screws 1b are screwed into the LED board accessory member 3 to form the LED board. It is attached to the back of 1.
  • a rectangular hole 3a is formed in the central portion of the LED board accessory member 3.
  • a connector 2 provided on the back surface of the LED substrate 1 is inserted through the hole 3a.
  • Positioning holes 5 and 5a for easily determining the relative positions of the LED panel 1000 and the housing frame 10 are formed on the left and right sides of the holes 3a in the LED substrate accessory member 3. Even if the dimensions of the positioning holes 5 and 5a and the positioning pins 15 (see FIG. 4) described later deviate within the range of the dimensional tolerance, the positioning pins 15 can be inserted into the positioning holes 5 and 5a on the left side.
  • the positioning hole 5 is formed in an elliptical shape, and the positioning hole 5a on the right side is formed in a circular shape.
  • the positioning holes 5 and 5a correspond to the second positioning hole.
  • the eight magnet adsorbents 4 are provided at four corners on the back surface of the LED substrate 1 and at the center of the four sides.
  • FIG. 4 is a perspective view showing the configuration of the image display device 100 with the LED panel 1000 removed.
  • the housing frame 10 which is a non-magnetic material, has a contact portion 12, a plurality of magnets 11, a positioning pin 15 made of a conductive metal material, and an LED panel 1000 with electric power.
  • a board 21 for supplying a signal is provided.
  • the substrate 21 is provided with a connector 20 that can be fitted with the connector 2 of the LED panel 1000.
  • the positioning pin 15 corresponds to the first positioning pin.
  • the contact portion 12 is made of a conductive metal material like the housing frame 10, and is provided on the portion of the housing frame 10 facing the peripheral edge portion on the back surface of the LED panel 1000. Specifically, the contact portion 12 is provided at a position facing the four corner portions of the LED substrate 1 and the central portions of the four sides. The contact portion 12 abuts on the peripheral edge portion on the back surface of the LED panel 1000 to determine the position of the LED panel 1000 in the front-rear direction. Further, a groove 13 (see FIG. 6) is formed in the central portion of the contact portion 12 to reflect and attenuate the light incident from the LED panel 1000 side a plurality of times. The details of the groove 13 will be described later.
  • the plurality of magnets 11 are provided around the contact portion 12 in the housing frame 10. Specifically, the plurality of magnets 11 are provided in the portion of the housing frame 10 facing the magnet adsorbent 4 provided on the LED panel 1000. Therefore, eight magnets 11 are provided for each LED panel 1000.
  • FIG. 5 is a cross-sectional view of the image display device 100 as viewed from the side. Specifically, FIG. 5 is a cross-sectional view showing a suction point between the magnet attraction body 4 and the magnet 11 and a connection point between the positioning hole 5 and the positioning pin 15.
  • the LED panel 1000 and the housing frame 10 are fixed by the magnet coupling by magnetic force attraction between the magnet 11 and the magnet adsorbent 4.
  • the LED panel 1000 abuts on the contact portion 12 provided on the housing frame 10, and the LED substrate 1 included in the LED panel 1000 has the same position in the front-rear direction of the vertically adjacent LED substrates 1.
  • the LED substrate 1 and the housing frame 10 are electrically connected.
  • the magnet 11 and the magnet attractant 4 correspond to a fixing portion for fixing the LED panel 1000 to the housing frame 10.
  • the magnet attractant 4 and the magnet 11 are provided 8 each for each LED panel 1000, but may be provided, for example, 4 each or 6 each, and the magnet attractant 4 may be provided. And the number of magnets 11 can be changed.
  • the positioning hole 5 provided in the LED panel 1000 is guided to the positioning pin 15 provided in the housing frame 10, so that the positions of the LED panel 1000 in the vertical and horizontal directions with respect to the housing frame 10 are fixed. ..
  • the housing frame 10 is provided with the positioning pin 15 as the first positioning pin
  • the LED panel 1000 is provided with the positioning hole 5 as the second positioning hole.
  • the 1 positioning hole and the LED panel 1000 may be provided with a second positioning pin to be inserted into the first positioning hole.
  • the positioning pin 15, the first positioning hole, the positioning hole 5, and the second positioning pin correspond to the positioning portion that determines the fixing position of the LED panel 1000 with respect to the housing frame 10.
  • the connector 2 provided on the LED panel 1000 and the connector 20 provided on the board 21 are fitted, and power and signals are supplied from the board 21 to the LED panel 1000 through both connectors.
  • FIGS. 6 to 11 are explanatory views for explaining the reflection of light in the gap between the LED panel 1000 and the adjacent LED panel 1000.
  • FIG. 6 is an explanatory view when a groove 13 having an opening angle of 90 ° and a depth of 0.5 mm is formed in the central portion of the contact portion 12.
  • LED chips 6 are mounted on the surface of the LED substrate 1 at equal intervals, and the LED substrate 1 is easily attached and detached between the LED substrate 1 and the adjacent LED substrate 1. Is provided with a gap of 0.3 mm in width.
  • the light incident from the LED panel 1000 side is reflected twice in the groove 13 and passes through the contact portion 12 having a reflectance of 85% twice, but 72% of the light passes through the gap on the image display surface. Since it is emitted, only the portion of the contact portion 12 is recognized by the viewer as a bright spot. However, the reflectance of the contact portion 12 including the groove 13 is 85%, and the reflectance of the LED substrate 1 is 70%.
  • the LED panel 1000 side is the upper side in the paper surface of FIG. 6, and the same applies to the subsequent drawings.
  • FIG. 7 illustrates the reflection of light incident at a position 0.15 mm away from the center of the groove 13 when the groove 13 having an opening angle of 100 ° and a depth of 0.5 mm is formed in the central portion of the contact portion 12. It is explanatory drawing for this.
  • the light incident from the LED panel 1000 side is repeatedly reflected 3 times in the groove 13 and 10 times at the end face of the LED substrate 1, and is calculated to be 0.85 3 * 0.
  • the light that reaches 7 10 and reaches the image display surface is 1.7%, which can be sufficiently attenuated.
  • the end surface of the actual LED substrate 1 is a laminated surface of the glass epoxy composite material, and the reflectance is less than 70%.
  • FIG. 8 is an explanatory diagram for explaining the reflection of light incident on a position 0.01 mm away from the center of the groove 13 having the same shape as that of FIG. 7.
  • the light incident from the LED panel 1000 side returns to the original optical path after being repeatedly reflected 12 times in the groove 13 and 8 times at the end face of the LED substrate 1.
  • the calculation is 0.85 12 * 0.7 8
  • the light that reaches the image display surface is 1.2%, which can be sufficiently attenuated.
  • FIG. 9 illustrates the reflection of light incident at a position 0.15 mm away from the center of the groove 13 when the groove 13 having an opening angle of 110 ° and a depth of 0.5 mm is formed in the central portion of the contact portion 12. It is explanatory drawing for this.
  • the light incident from the LED panel 1000 side is repeatedly reflected 6 times in the groove 13 and 12 times at the end face of the LED substrate 1, and is calculated to be 0.85 6 * 0.
  • the light that reaches 7 12 and reaches the image display surface is 0.5%, which can be sufficiently attenuated.
  • the end surface of the actual LED substrate 1 is a laminated surface of the glass epoxy composite material, and the reflectance is less than 70%.
  • FIG. 10 is an explanatory diagram for explaining the reflection of light incident on a position 0.01 mm away from the center of the groove 13 having the same shape as that of FIG.
  • the light incident from the LED panel 1000 side returns to the original optical path after being repeatedly reflected 24 times in the groove 13 and 13 times at the end face of the LED substrate 1.
  • the calculation is 0.85 24 * 0.7 13 , and the light that reaches the image display surface is less than 0.1% and can be sufficiently attenuated.
  • FIG. 11 illustrates the reflection of light incident at a position 0.15 mm away from the center of the groove 13 when the groove 13 having an opening angle of 120 ° and a depth of 0.5 mm is formed in the central portion of the contact portion 12. It is explanatory drawing for this.
  • the light incident from the LED panel 1000 side returns to the original optical path after being repeatedly reflected four times in the groove 13 and three times at the end face of the LED substrate 1.
  • the calculation is 0.85 4 * 0.7 3 , and the light reaching the image display surface is 17.9%, which cannot be sufficiently attenuated.
  • the opening angle shown in FIG. 12 is 108 °. Since 108 ° is an integral multiple of the angle 36 ° between the groove 13 and the LED substrate 1, diffused reflection of light does not occur, and the light cannot be sufficiently attenuated as in the case where the opening angle shown in FIG. 11 is 120 °. ..
  • FIG. 13 is a diagram showing a list of reflectances for determining the opening angle of the groove 13, and shows the number of reflections and the reflectance in each member when the opening angle is increased by 1 ° from 90 °.
  • the housing groove is the groove 13 of the contact portion 12, and the substrate is the LED substrate 1.
  • the aperture angles of less than 10% of the incident light incident at positions 0.15 mm and 0.01 mm away from the center of the groove 13 are 98 ° or more and 100 ° or less, 103 ° or more and 105 ° or less, and 110 ° or more. You can select from 113 ° or less.
  • the opening angle is 120 ° or more, the opening width becomes large and the contact area between the LED substrate 1 and the contact portion 12 becomes small. Therefore, the opening angles are set to 99 °, 104 °, and 111 in consideration of processing accuracy. It is desirable to set it to either °.
  • the shot blast treatment on the surface of the groove 13
  • fine irregularities are formed on the surface of the groove 13.
  • the light incident from the LED panel 1000 side can be diffusely reflected and attenuated.
  • the front surface of the contact portion 12 since the front surface of the contact portion 12 needs to be in close contact with the LED substrate 1, the front surface of the contact portion 12 is processed after the shot blasting process.
  • FIG. 14 is an explanatory diagram for explaining the reflection of light in the gap between the image display device 100 and the adjacent image display device 100.
  • the opening angle of the groove 13 is selected from 98 ° or more and 100 ° or less, 103 ° or more and 105 ° or less, and 110 ° or more and 113 ° or less. Desirably, by setting the opening angle of the groove 13 to any of 99 °, 104 °, and 111 °, bright spots and bright lines are generated in the gap between the image display device 100 and the adjacent image display device 100. Can be suppressed.
  • the image display device 100 is provided on the LED panel 1000 on which the LED chip 6 is arranged, the housing frame 10 to which the LED panel 1000 is to be fixed, and the housing frame 10.
  • the positioning pin 15 or the first positioning hole and the second positioning pin provided in the LED panel 1000 and inserted into the positioning hole 5, 5a or the first positioning hole are included with respect to the housing frame 10.
  • a positioning portion for determining the fixing position of the LED panel 1000 and a fixing portion for fixing the LED panel 1000 to the housing frame 10 are provided.
  • the contact portion 12 is provided, and the contact portion 12 is formed with a groove 13 having an opening angle selected from 98 ° or more and 100 ° or less, 103 ° or more and 105 ° or less, and 110 ° or more and 113 ° or less. ..
  • the multi-display system 200 is a combination of a plurality of video display devices 100.
  • the reflected light emitted from the groove 13 can be attenuated. As a result, it is possible to suppress the generation of bright spots and bright lines in the gap between the LED panel 1000 and the adjacent LED panel 1000, so that the quality of the image display can be improved.
  • the fixing portion includes a magnet 11 provided around the contact portion 12 in the housing frame 10 and a magnet adsorbent 4 provided at a position facing the magnet 11 on the back surface of the LED panel 1000, and is a magnet.
  • the LED panel 1000 and the housing frame 10 are fixed by the magnet coupling between the 11 and the magnet adsorbent 4 by magnetic force attraction.
  • the LED panel 1000 can be easily attached to and detached from the housing frame 10. Further, since the electrical connection between the housing frame 10 and the LED panel 1000 can be maintained, the diffusion of electrical noise in the housing frame 10 can be suppressed.
  • the surface of the groove 13 is formed with irregularities capable of diffusely reflecting and attenuating the light incident from the LED panel 1000 side, the reflectance of the groove 13 can be reduced. As a result, it is possible to suppress the generation of bright spots and bright lines in the gap between the LED panel 1000 and the adjacent LED panel 1000 as compared with the case where the surface of the groove 13 has no unevenness.
  • a plurality of video display devices 100 can be arranged in a matrix, and since the groove 13 is located in the gap between the video display device 100 and the adjacent video display device 100, the video adjacent to the video display device 100 is located. It is possible to suppress the generation of bright spots and bright lines in the gap between the display device 100 and the display device 100.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Led Device Packages (AREA)

Abstract

La présente invention a pour but de fournir une technologie permettant d'améliorer la qualité d'un affichage vidéo. Un dispositif d'affichage vidéo (100) est pourvu des éléments suivants : un panneau à DEL (1000) ; un cadre de boîtier (10) auquel le panneau à DEL (1000) doit être fixé ; une partie de positionnement qui détermine une position de fixation du panneau à DEL (1000) par rapport au cadre de boîtier (10) ; et une partie de fixation qui fixe le panneau à DEL (1000) au cadre de boîtier (10). Une partie de contact (12) qui est en contact avec une partie périphérique d'une surface arrière dans le panneau à DEL (1000) est disposée dans le cadre de boîtier (10). La partie de contact (12) comporte une rainure (13) qui a un angle d'ouverture choisi parmi 98-100°, 103-105° et 110-113°.
PCT/JP2020/033923 2020-09-08 2020-09-08 Dispositif d'affichage vidéo et système à affichage multiple WO2022054125A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/033923 WO2022054125A1 (fr) 2020-09-08 2020-09-08 Dispositif d'affichage vidéo et système à affichage multiple

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/033923 WO2022054125A1 (fr) 2020-09-08 2020-09-08 Dispositif d'affichage vidéo et système à affichage multiple

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WO2022054125A1 true WO2022054125A1 (fr) 2022-03-17

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030011303A1 (en) * 2001-07-12 2003-01-16 Matthies Dennis L. Providing optical elements over emissive displays
JP3193153U (ja) * 2014-04-18 2014-09-18 ユニルミングループカンパニーリミテッドＵｎｉｌｕｍｉｎ Ｇｒｏｕｐ Ｃｏ．， Ｌｔｄ． Ｌｅｄ表示パネル
WO2014172848A1 (fr) * 2013-04-24 2014-10-30 成卓 Module à del comprenant une structure de montage magnétique et écran d'affichage à del
US20170006727A1 (en) * 2015-06-24 2017-01-05 Samsung Electronics Co., Ltd. Display module, display device and methods of assembling and disassembling display module
WO2018116514A1 (fr) * 2016-12-19 2018-06-28 三菱電機株式会社 Affichage multiple
US20180190631A1 (en) * 2016-12-30 2018-07-05 Lg Display Co., Ltd. Display device and multi-screen display device using the same
JP2019074732A (ja) * 2017-10-05 2019-05-16 クリスティ デジタル システムズ ユーエスエイ インコーポレイテッド Ｌｅｄモジュール継ぎ目照明
US20200063767A1 (en) * 2018-08-23 2020-02-27 Samsung Electronics Co., Ltd. Display apparatus and disassembling method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030011303A1 (en) * 2001-07-12 2003-01-16 Matthies Dennis L. Providing optical elements over emissive displays
WO2014172848A1 (fr) * 2013-04-24 2014-10-30 成卓 Module à del comprenant une structure de montage magnétique et écran d'affichage à del
JP3193153U (ja) * 2014-04-18 2014-09-18 ユニルミングループカンパニーリミテッドＵｎｉｌｕｍｉｎ Ｇｒｏｕｐ Ｃｏ．， Ｌｔｄ． Ｌｅｄ表示パネル
US20170006727A1 (en) * 2015-06-24 2017-01-05 Samsung Electronics Co., Ltd. Display module, display device and methods of assembling and disassembling display module
WO2018116514A1 (fr) * 2016-12-19 2018-06-28 三菱電機株式会社 Affichage multiple
US20180190631A1 (en) * 2016-12-30 2018-07-05 Lg Display Co., Ltd. Display device and multi-screen display device using the same
JP2019074732A (ja) * 2017-10-05 2019-05-16 クリスティ デジタル システムズ ユーエスエイ インコーポレイテッド Ｌｅｄモジュール継ぎ目照明
US20200063767A1 (en) * 2018-08-23 2020-02-27 Samsung Electronics Co., Ltd. Display apparatus and disassembling method thereof

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